Apps like 7Z: Zip 7Zip Rar File Manager for Android or 7Zip Browser for iOS can handle these archives. Safety Note
They often achieve 30–70% better compression than the standard ZIP format. FCNMA.7z
The file "FCNMA.7z" appears to be a compressed archive using the , a modern alternative to standard ZIP files known for its high compression ratios. What is a .7z File? Apps like 7Z: Zip 7Zip Rar File Manager